ULLETIN - EAS ACTIVATION REQUESTED
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
600 PM EDT MON MAR 18 2013
THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHERN CHEROKEE COUNTY IN NORTH CENTRAL GEORGIA
NORTHERN COBB COUNTY IN NORTH CENTRAL GEORGIA
NORTHWESTERN DEKALB COUNTY IN NORTH CENTRAL GEORGIA
FORSYTH COUNTY IN NORTH CENTRAL GEORGIA
NORTHEASTERN FULTON COUNTY IN NORTH CENTRAL GEORGIA
NORTHWESTERN GWINNETT COUNTY IN NORTH CENTRAL GEORGIA
SOUTHERN BARTOW COUNTY IN NORTHWEST GEORGIA
NORTHERN PAULDING COUNTY IN NORTHWEST GEORGIA
NORTHEASTERN POLK COUNTY IN NORTHWEST GEORGIA
* UNTIL 645 PM EDT
* AT 557 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMA CAPABLE OF PRODUCING A TORNADO NEAR TAYLORSVILLE...
MOVING EAST AT 60 MPH. THERE IS ANOTHER AREA OF ROTATION CAPABLE OF PRODUCING
A TORNADO SOUTHEAST OF BRASWELL.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
SPRINGS...CANTON...MOUNTAIN PARK...SANDY SPRINGS...BUFFINGTON...
BERKELEY LAKE...JOHNS CREEK...DULUTH...CUMMING AND SUWANEE.
HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT WILL BE TOO LATE TO GET TO A SAFE
IF YOU SEE WIND DAMAGE...HAIL OR FLOODING...WAIT UNTIL THE STORM HAS
PASSED...AND THEN CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8
6 6 7 6 3 4 4 6 6. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT MONDAY EVENING
FOR NORTHWESTERN GEORGIA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN
EFFECT UNTIL 1000 PM EDT MONDAY EVENING FOR NORTHWEST GEORGIA.
Monday, March 18, 2013
High resolution model forecasts, like the one pictured above, show a significant snowfall event is in the making. Current indications are that snow amounts will exceed one foot in much of Maine, New Hampshire, Vermont, New York and even into parts of Pennsylvania. Coastal areas, like New York City and coastline towns wil receive lighter accumulations, possibly nothing at all if you are in areas like southern New Jersey. For the inland areas that do receive snow, isolated amounts of up to 18 inches are possible, especially in Maine and portions of Vermont and New Hampshire. This potential is not all that great outside of Maine, but there is still potential.
Radar imagery indicates isolated supercells are blossoming over the aforementioned states this afternoon as instability and shearing become conducive for severe weather. An overview of instability parameters reveals the strongest buoyancy is to the south of these supercells, but a sufficient level of energy is on hand for these cells to really get going. Wind shear analysis shows that these storms are pumped with 40-60 knots of shearing- more than enough for severe weather. Composite analysis by the Storm Prediction Center tells me the highest tornado threat is not centered in the supercells crossing into Georgia, but is actually centered over central Alabama. A combination of enhanced spinning and additional instability in the midsection of AL is allowing an increased tornado potential to evolve, making for a very dangerous situation over much of the Gulf Coast this afternoon.
"He said I wanna see you again
But I'm stuck in colder weather
Maybe tomorrow will be better
Can I call you then"
(From Zac Brown Band song, Colder Weather)
As the Zac Brown Band tells in Colder Weather, it looks like the majority of the nation is going to be stuck in colder weather. Unfortunately, tomorrow will not be better- if anything, it will be even colder.
For those of you who follow the idea that above normal snow cover in Siberia during October can make the Arctic Oscillation go negative in the following winter, this is a direct byproduct of that idea. The last third of October 2012 had way above normal snow cover, meaning we could be in for a month or more of below normal temperatures. Happy Spring!